Steam-injector.



nu. 708,323. Patented sept. 2, |902. r J. nEsmoNo.

STEAM INJECTOB.

(Application filed Dec. 24, 1901.) (Model.)

gnou/Lto@ UNITED j JOHN DESMOND, OF CINCINNATI, OIIIO, ASSIGNOR TO THE WILLIAM POWELL COMPANY, OF CINCINNATI, OHIO, A CORPORATION OF OHIO.

STEAM|NJECT0R.

SPECIFICATION forming part of Letters Patent No. 708,323, dated September 2, 1902.`

l Application filed December 244, 1901. Serial No. 87,091. (Model.)

To @ZZ whom t may concern:

Be it known that I, JOHN DESMOND, of Oincinnati, in the county of Hamilton and State of Ohio, have invented certaininew and useful Improvements in Steam-Injectors; and I do hereby declare the following tobe a full, clear, and exact description of the invention, such as will enable others skilled inthe art to which it appertains to make and use the same.

In that class of injectors employing a valve for automatically cutting off theovertlow at the mouth of the combining-tube the creation of a vacuum is depended upon for the seating of such valve. If, however, before the valve is seated air within the casing is drawn into the combining-tube by the creation of the Vacuum, it will pass into the tube and out through the spill and be again taken in at the mouth of the tube. This retards the starting of the injector and will continue until the head of steam is sufficiently increased to overcome the detrimental influence of the presence of air.

The primary object of this invention is to insure the automatic seating of the cut-off valve independently of and prior to the formation of a vacuum.

A further object isto provide an injector the body of which may be made of inferior quality of metal, thereby greatly reducing the cost of manufacture.

The invention will be hereinafter fully set forth, and particularly pointed out in the claims.

In the accompanying drawings, Figure lis a Vertical longitudinal sectional View of an injector equipped with my improvements.

`Fig 2 is an enlarged view, in side elevation,

of the combining and delivery tubes. Fig. 3 is an end view of such'tubes. Fig. 4 is an enlarged view of the automatically-operated valve. Fig. 5 is a similar view of one of the Vlows immediately.

loosely mounted on the combining-tube, so as to be movable between a flange 5 and the enlarged end of the water-lifting tube 6, is formed with a ring 7 and a` iiange 8. This flange isset at an angle or pitch of about forty-five `degrees relatively to the ring portion of the valve, so as to give to the valve a cup shape and present a right-angle face to the spill or discharge from the combiningtube passing out through the oblique opening 3. The water so discharged through this opening against the right-angle inclined face of the valve entering the cupped side thereof will force lthe latter to its seat against the end of the Water-lifting tube, thereby cutting off any intake of water at the mouth of the combining-tube.

This seating of the valve is eected by the water discharged through the oblique spill-opening just at the time a vacuum is formed at the mouth of the combining tube. The overflow at the latter point being there cut oif, the formation of the column fol- Furthermore, by thus forming the valve the seating thereof against the Water-lifting tube is insured regardless of wear-that is, the valve will lit snug against its seat, even though its inclined face or its seat on the lifting-tube be considerably worn.

The second branch of the present invention consistsin providing the several inlet and outlet openings ofthe injector with bushings 9, of yielding or malleable non corrosive metal more durable than the metal from which the body of the casing'is formed. The latter may be made of any inferior quality, such as cast-iron, while the bushings may be of bronze. Each of these bushings is formed so as to conform to the contour of the casingopenings-that is to say, each bushing is shown as having an annular portion 10, forced into a socket, and a flared iiange 12. By thus making the injector-casing of inferior metal,

, while the bushings are of non-corrosive yielding metal, the cost of manufacture is greatly reduced and firm seating of the coupling-nipples is insured.

From what has been said the operation of the injector will be manifest `to those skilled in the art.

loo

v valve.

The parts not hereinbefore specifically mentioned may be enumerated as follows: The steam-inlet 13, the water-inlet 14, the boileroutlet 15, the overflow-outlet 16, the overflowdischarge-controllin g valve 17 ,the steam-inlet tube 18, the delivery-tube 19, and the controlling-valve 20. The pipe-couplings, the nipples or tailpieces of which are designed to seat against the yielding bushings, are shown in dotted lines at 2]..

I have found that an-injector equipped with my improved cut-off valve is capable of quick automatic starting, with the result that if the established column should at any time break the injector will instantly restart, because of the quick reseating of the valve, the overflow through the obliquely-arranged Spill-opening being into the cupped valve. The inclined face of the latter being at practically right angles to such discharge so directs the water into the valve as to effect the seating thereof at the time a vacuum is created, but before the vacuum is of sufficient strength to lift the This feature I regard as a decided advance in the art, producing, as it does, far better results than heretofore obtainable by injectors employing cut-off Valves.

l. In a steam-injector, a valve for cutting off the overfiow at the mouth of the combining-tube, and the combining-tube having a spill-outlet set at such angle relatively to the valve that the latter will be seated by the force of thewater discharged through such opening, as set forth.

2. In a steam-injector, a cup-shaped Valve for cutting off the overl'iow at the mouth of the combining-tube, and the combining-tube having a spill-outlet so arranged that the discharge lhereth rough will be directed into the cupped side of the Valve for effecting the seating thereof by the force of the water discharged through such opening, substantially Y as set forth.

3. In a steam-injector, a valve for cutting off the overflow at the mouth of the combining-tube formed with a face set at an angle, and the combining-tube having a spill-outlet opening for directing the overflow passing therethrough against such face of the valve, as and for the purpose stated.

4. In a steam-injector, a valve for cutting off the overflow at the mouth of the combining-tube formed with two faces set at an angle, the combining-tube having a spill-outlet opening for directing the overflow passing therethrough against one of said faces, and the water-lifting tube having a seat against which the other face of the valve is designed to be seated, as and for the purpose stated.

5. The combination with the combiningtube having a spill-opening set at an angle, of a valve for cutting off the overflow at the mouth of such combining-tube, said valve having a face set at an angle and against which the discharge through said spill-opening is designed to strike, as and for the purpose stated.

G. The combination with the combiningtube having a spill-opening set at an angle,.

of a valve having a central ring slidable on the combining-tube, and a flange atan oblique angle yto such ring against one side of which the discharge through said spill-opening is designed to strike, and the water-lifting tube having a seat for such valve, substantially as set forth.

7. The combination with the casing and the couplings, the former being composed of inferior material, and the latter having nipples or tailpieces, of the bushings forming seats for such nipples formed of yielding non-corrosive metal of a superior grade to that composing the casing, as set forth.

8. The combination with the casing having Socketed openings, and the couplings designed to be secured thereto having nipples or tailpieces, such casing being composed of inferior material, such as cast-iron, of the bushings having ann ular portions iittedin the sockets of the several openings and having flared portions against which the nipples are designed to bear, such bushings being formed of yielding non-corrosive metal of a grade different from that composing the casing, as set forth.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

JOHN DESMOND.

Witnesses:

G. M. RUFF, WM. H. SCHWEIKERT. 

